Mask with an air filtering device

Details Mask with an air filtering device Mask with an air filtering device

1991-06-11

1992-04-14

Nozick, Bernard

Gas separation

Combined or convertible

21713, 12820529, 12820617, 55414, B01D 5000

Patent

active

051044307

ABSTRACT:
This invention relates to a mask with an air filtering device and in particular to one including a helmet adapted to a head of a user, a visor pivotally connected with a lower side of the helmet and having a soft pad for preventing air entering therein from outside, a filtering chamber having a blower driven by a dc motor and a filtering plate mounted between the blower and a cover of the filtering chamber, a pipe connected at one end with an outlet of the blower and extending at the other to space around mouth and nose of the user, a curved air guider for converging cleaned air into the space around the mouth and nose of the user and a check valve mounted on the soft pad for exhausting air exhaled by the user.

REFERENCES:
patent: 3963021 (1976-06-01), Bancroft

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